Classic English Toffe - cooking recipe

Ingredients

1 cup unsalted butter
1 cup sugar
2 tablespoons water
1/4 teaspoon vanilla
3 ounces semisweet chocolate
3 ounces bittersweet chocolate

Preparation

Line pan with heavy foil or wax paper.
Combine butter, sugar, water & salt in heavy saucepan.
Bring to a boil over medium heat, stirring frequently.
Continue boiling about 20 minutes, stirring frequently, until hard crack stage (305-310).
Watch closely -- do not let get above 310.
Immediately pour onto prepared pan & sprinkle with chocolate chips.
Break into pieces & store in airtight container.